This paper introduces a new version of the open-source educational software, LESM (Linear Elements Structure Model), developed in MATLAB for structural analysis of one-dimensional models such as frames, trusses, and g...This paper introduces a new version of the open-source educational software, LESM (Linear Elements Structure Model), developed in MATLAB for structural analysis of one-dimensional models such as frames, trusses, and grillages. The updated program includes dynamic analysis, which incorporates inertial and damping effects, time-dependent load conditions, and a transient solver with multiple time integration schemes. The software assumes small displacements and linear-elastic material behavior. The paper briefly explains the theoretical basis for these developments and the reorganization of the source code using Object-Oriented Programming (OOP). The updated Graphical User Interface (GUI) allows interactive use of dynamic analysis features and displays new results such as animations, envelope diagrams of internal forces, phase portraits, and the response of degrees-of-freedom in time and frequency domain. The new version was used in a structural dynamics course, and new assignments were elaborated to improve students’ understanding of the subject.展开更多
The objective of this study is to explore a potentially effective training method for the hospital professionals to educate drug users and to enhance their knowledge of HIV infection. One hundred and sixty one subject...The objective of this study is to explore a potentially effective training method for the hospital professionals to educate drug users and to enhance their knowledge of HIV infection. One hundred and sixty one subjects, who came from 13 different provinces and were admitted in a drug relief hospital in Beijing, were recruited for this study. The average age of these subjects was 35.21±6.24 year old. The average numbers of years for drug addiction were 7 years, and the average numbers of drug relief treatment received in the past was 5.5 times. The level of AIDS knowledge of these subjects, including pathogenic factors, source of infection, route of transmission and preventive measures, were evaluated before and after receiving the AIDS educational training to these drug users. Our results showed that there was a statistically significant increase (P<0.01) in the knowledge of HIV infection and prevention among these subjects. Positive attitude and behavioral tendencies toward HIV prevention were also improved. Therefore, it is imperative for the medical professionals to incorporate AIDS education into drug relief treatment to achieve the maximum effect on the knowledge of AIDS and improvement of positive attitudes and behaviors toward HIV prevention among drug users.展开更多
We illustrate a case study,where students designed enterprise architectures,that were not only welcome but successfully implemented.The success key was threefold.First the analysis framework,that integrates all the as...We illustrate a case study,where students designed enterprise architectures,that were not only welcome but successfully implemented.The success key was threefold.First the analysis framework,that integrates all the aspects of the systems that are relevant to users,namely user interface,rules,and information.Second,the analysis approach,that guides,trough confirmatory sessions,to elicit real requirements from users.Third,the model-to-model transformation,that assures consistency from the highest aggregate abstraction down to an executable model.展开更多
文摘This paper introduces a new version of the open-source educational software, LESM (Linear Elements Structure Model), developed in MATLAB for structural analysis of one-dimensional models such as frames, trusses, and grillages. The updated program includes dynamic analysis, which incorporates inertial and damping effects, time-dependent load conditions, and a transient solver with multiple time integration schemes. The software assumes small displacements and linear-elastic material behavior. The paper briefly explains the theoretical basis for these developments and the reorganization of the source code using Object-Oriented Programming (OOP). The updated Graphical User Interface (GUI) allows interactive use of dynamic analysis features and displays new results such as animations, envelope diagrams of internal forces, phase portraits, and the response of degrees-of-freedom in time and frequency domain. The new version was used in a structural dynamics course, and new assignments were elaborated to improve students’ understanding of the subject.
文摘The objective of this study is to explore a potentially effective training method for the hospital professionals to educate drug users and to enhance their knowledge of HIV infection. One hundred and sixty one subjects, who came from 13 different provinces and were admitted in a drug relief hospital in Beijing, were recruited for this study. The average age of these subjects was 35.21±6.24 year old. The average numbers of years for drug addiction were 7 years, and the average numbers of drug relief treatment received in the past was 5.5 times. The level of AIDS knowledge of these subjects, including pathogenic factors, source of infection, route of transmission and preventive measures, were evaluated before and after receiving the AIDS educational training to these drug users. Our results showed that there was a statistically significant increase (P<0.01) in the knowledge of HIV infection and prevention among these subjects. Positive attitude and behavioral tendencies toward HIV prevention were also improved. Therefore, it is imperative for the medical professionals to incorporate AIDS education into drug relief treatment to achieve the maximum effect on the knowledge of AIDS and improvement of positive attitudes and behaviors toward HIV prevention among drug users.
文摘We illustrate a case study,where students designed enterprise architectures,that were not only welcome but successfully implemented.The success key was threefold.First the analysis framework,that integrates all the aspects of the systems that are relevant to users,namely user interface,rules,and information.Second,the analysis approach,that guides,trough confirmatory sessions,to elicit real requirements from users.Third,the model-to-model transformation,that assures consistency from the highest aggregate abstraction down to an executable model.
